Strip-corrugating machine



Feb. 24-, 1931. D. MEISELBACH 1,793,629

' STRIP CORRUGATING MACHINE Filed Nov. 1. 1928 4 Sheets-Sheet 1 Feb. 24,1931. A. D. MEISELBACH 1,793,629

STRIP CORRUGATING MACHINE Filed Nov. 1. 1928 4 Sheets-Sheet 3 3 lnueWZ/@wzzzm zewm Feb. 24, 1931. A. D. MEISELBACH' 3 5 STRIP CORRUGATINGMACHINE I Filed Nov'. 1. 1928 4 Sheets-Sheet 4 Patented Feb. 24, 1931UMTED stares rarest: "orsrcsof AuUs'r i); ME sELB oH,

orcrrronoo, ILLiNoIs, ASSIGNOR OF ONE-HALFTOWILLIAM J. saunsnne, orourcaeo, rumors a sritrr-connuearme' MACHINE Application filed November1, 1928. se l No. 316,397. 1 f

V This invention relates to novel means for producing a corrugated thinmetal strip, and

has special reference to. improved means and methods forproducing stripsaccurately core rugatedin relatively squarezigzag form for useparticularly in producing what are known as punch or sales boards of thekind forming the subject-matter of my United States Letters Patent No.1,713,293, granted May 14,

1:) 1929.- e In the production of such boards thin sheet metal stripsequal in width to the thickness of the board are bent into zigzag formandaplurality of these strips are arranged 1 together to form the boardwith a large number of relatively small cells or pockets extendingthrough the thickness of the board. It is desirable that thecorrugations have rather sharp square bends, and it is the for 29mationof such-bends in a zigzag strip with which this application hasparticularly to do. V

In forming the thin metal strips from a fiat condition to the finishedigzag corrugated form several steps are necessary, as it has so farappeared to be a physical impossibility to form the square-bendcorrugations in one operation with sufiicient rapidity to bring the costwithin the allowed limits.

In my novel method I first partly form thecorruga tions, that is, Ifirst form them with rounded tops and bottoms, andrthen in afurther-operation I finish the corrugations,

making the tops and bottoms flat and the bends square. "For this laststep the-only feasible manner is to press the partly formed stripsbetween two interfitting dies formed to receive the partly formed stripbetween them and when pressed tightly together form the 5 tops andbottoms of the corrugations-flat and the bends square.

.As these strips have considerable length, sometimes having as'many asone hundred corrugations, and as in order to properly form thecorrugations these interfitting dies must fit accurately with onlyclearance enough between them to receive the metal of the strip, it willbe seen that the partly formed strip must accurately agree with thedies-as 59 to pitch of corrugations,.that is, the distance from centerto center of the corrugations must be so exactly like the "distance fromcenter to center of the forming projections on the dies that even when astrip with one hundred or more-corrugations. is placed upon on the diesit willlie flat on the lower die and will receive the'projections of theupp'er'die 7 wlthout any undue pressing :ofthemetal at"v the sides jofthe pro ections. 1

'Ihis invention-has to do particularly with no,

means for producing the partly formed strip with such accuracy of pitchthat the stripfor the last operation. I

The invention will be more readily under stood by reference to theaccompanying drawings fornung part of this specification and in which VFig. 1 is'atopj plan view of'a strip corrugating machinemadein'accordance with my In invention;

. Fig. 2 is a vertical, longitudinal section ontheline22 of Fig.1; Fig.3 is a fragmentary, vertical, longitudinal section on the line 3-3 ofFig. 1; T-Fr Figs. 4 and 5 are fragmentary, vertical, transversesections on the lines ll and 5 5 respectively of Fig. 1; c I

Fig. 6 is an' enlarged,fra gmentary, longi tudinal section through; theforming elements similar to Fig. Q-and showing a strip-in process ofbeing formed;

Fig. 7 is a section similar to Fig. 6 but without the strip;

Fig. 8 is a fragmentary, longitudinal" seci tion of a pair of dieelements such as are used for the final operation of forming the squarecorrugations} v Fig. 9 is an enlarged, fragmentary, long-i tudin'alsection'of the die'members showing the partly formedst'rip in place onthe lower die ready to receive'theupper die for the final will beproperly received intheforming dies Fig: 12-.is apersp ective view ofastrip Mu 1 and fixed a second toothed rack 9 which also the guidegroove 2;

after it has passed through the machine; and Flg. 13 1s a similar viewof the strip in finished condition.

The machine shown in Fig. 1 consists of a base 1, provided with alongitudinal guideway 2 1n wh1ch an elongated longitudinally movablemember or bar 8 is arranged and the shaft 6 by which the shaft, 6 can bemain ually rotated'to rotate the gear owhich in turn moves the bar ,3along the base through At the other side of the-bar 3 is providedextends the length of the bar 3. This rack as best shownin Figs. 6 and?has teeth 10 formed to cooperate with similar teeth 11 on a pinion 12 toform a thin sheetmetal strip .13 into corrugated form with corrugations14 having rounded tops -15and similar rounded bottoms 16 when the stripsare passedbetween the rackand the pinion, as illus-v trated in Figs2 and6.

As will be seen from an examination of.

Fig. 7, the teeth of the rack 9 and pinion 12 are formed to provide aspace 17 between them of a thicknessto receive the strip 13.

, The strips 13 are out of the width desired and may be formed in anylength, though preferably the strips are formed of the length deslredfor use 1n making no the sales boards.

The accuracy of thepitch of the corrugations 14 is attained by leavingthe pinion 12 loose on the shaft 6 and feeding the rack 9 through inunder the pinion 12 by means of the rack 4 and gear 5. In other words,the pinion 12 during the corrugation forming operation merely followsthe rack 9 and no pressure. is applied to the strip 13 except merely thecorrugation forming pressure. After the strip has thus been partlyformed it is laid upon a toothed lower die member 18, as shown in Fig.9, and a similar upper die member 19 is forced down upon same, as shownin Fig. 10, forming the rounded ended corrugations 1 1 into squarecorrugations, as

shown at 20, Fig. 10. That is, the rounded tops and bottoms areflattened and the sides of the corrugations are straightenedup, makingthe square corrugations 20 which are the ultimate object of theinvention.

' For the purpose of guiding the strip 13 through the machine during thecorrugating operation guide plates 21 and 22 are provided. Plate 21is-fixed on one side of the machine close to the outer side of the rack9 and the plate 22 is arranged on the opposite side of the'rack. Theplate 22 is carried on a horizontal guide pin 23 which is movabletransversely of themachine through a fixed bearing 2%. At opposite-sidesof the guide pin 23 the plate 22 carries horizontally projection pins 25for supporting compression' springs 26 arranged between the bearlngmember24e and the plate 22. These springs tend to hold the plate 22yieldingly against "theadjacent edge-of a strip 13 as it passes throughbetween the plates 21 and22 and 1s being fed between the rack 9 and thepinion 12. These guide plates hold the strip transversely and cause itto be fed straight through the machine. I

In Fig. 11 I have shown'a corner of one of of the corrugated strips13-laid together so that the square corrugations make square cells oropenings 28 in the board. These strips are clamped together between endclamping strips 29 by clamping-bolts'30. It is desired that thecorrugations be as squarecornered as possible so that thestrips willproperly pack together when vclampedtogether to form aboard, and also sothat the pitch of the openings in the board will be uniform for thepurpose both of further processes through which the board 1s put incompleting it and for use with filling ma-- chines for placing the salesindications in the cells 28.

As many modifications of my-invention.

will readily suggest themselves to one skilled in the art, I do notlimit.or confi ne my inpast the pinion, asecond toothed wheel arranged abovethe movable member andof,

larger diameter than the pinion, a second rack fixedon the memberparallel with the first rackand with which second- I'iLCkTSELld.

second toothed wheel meshes, the second tooth-ed wheel rigidly mountedonsaid shaft forrotation therewith, and means for rotat-. ing. said shaft.1 '7 1' 21111 a machine for corrugating strips of sheetmetal, a shaftmounted in-bearings for rotation, a toothed wheel carried by the shaftand freely rotatable thereoma' second toothed wheel carried by the shaftand fixed thereon, a member movable transversely inrelation to theshaft, two toothed racks fixed on said member, one thereof meshing witheach of said toothed wheels, and means for rotating said shaft, the.strip to be corrugated being the sales boards 27 made up of a plurality0 passed between the toothed wheel, which. is

I gitudinally movable member, means for posifreely rotatable on theshaft, and its cooperating rack, the other rack and toothed-wheel beingoperative to move said member in relation to the shaft.

3. In a machine for corrugating strips of sheet metal, two co-operating, intermeshing, toothed members between which the strips are passedto be corrugated, means for positively moving one of said members, theother member being free to follow the positively moved member.

4. In a machine for eorrugating sheetmetal strips, a toothed rotatablemember and a oo-operating, intermeshing, toothed, 10ntively moving oneof said members, the other member being free to follow the positivelymoved member.

5. In a machine for corrugating sheetmetal strips, a rotatable toothedmember and a co-operating, intermeshing toothed rack,

the strips being adapted to be passed between the co-operating teeth tobe corrugated, means for positively moving the rack, the

rotatable toothed member being free to follow the movements of the rack.

In testimony whereof, Ihave hereunto set my hand, this 17th day ofOctober, 1928.

AUGUST D. MEISELBAGH;

